2-[(2-氧代-1,2-二氢-喹啉-4-基甲基)-氨基]-丙二酸二乙酯（瑞巴派特杂质），98%

2-[(2-Oxo-1,2-dihydro-quinolin-4-ylmethyl)-amino]-malonic acid diethyl ester (Rebamipide Impurity)